CN105289934A - Piezoelectric injection type precise quantification dispensing device and dispensing method thereof - Google Patents
Piezoelectric injection type precise quantification dispensing device and dispensing method thereof Download PDFInfo
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- CN105289934A CN105289934A CN201510908781.9A CN201510908781A CN105289934A CN 105289934 A CN105289934 A CN 105289934A CN 201510908781 A CN201510908781 A CN 201510908781A CN 105289934 A CN105289934 A CN 105289934A
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Abstract
The invention relates to the field of electronic packaging, and particularly relates to a piezoelectric injection type precise quantification dispensing device and a dispensing method thereof. A piezoelectric stack PZT driver is inlaid in a primary amplifying mechanism in interference fit; the piezoelectric stack PZT driver is connected with a piezoelectric ceramic high voltage power supply; sheet metal is adhered to the primary amplifying mechanism, and an SGS strain gage is adhered on the sheet metal; the SGS strain gage is connected with a signal conditioning unit; a thrice-amplifying mechanism is arranged above the primary amplifying mechanism and comprises a lower plate, an upper plate, a connecting rod and a firing pin; the same ends of the upper plate and the lower plate are flexibly connected, and the lower plate is also connected with the upper part of the body of an elastic amplifying mechanism; the firing pin is inserted into a hole in a cover plate above a cavity of a machine base, a sealing ring is arranged in the hole, and the firing pin extrudes a glue solution in the cavity to be ejected from a nozzle. The device realizes quartic amplification of slight elongation produced by the piezoelectric stack PZT driver, the piezoelectric stack PZT driver is used as a power to achieve injection type non-contact dispensing, and the dispensing quality is improved.
Description
Technical field
The present invention relates to Electronic Packaging field, be specially piezo jet formula accurate quantification point glue equipment and dispensing method thereof.
Background technology
Dispensing technology refers to and is assigned on assigned address according to desired trajectory by colloid with controlled plastic emitting speed and gel quantity.Point colloid system is widely used in production field, comprises semiconductor packages, microelectronics Packaging, the welding of SMT/PCB assembling and even general industry, note be coated with and sealing etc.The Process of Applying Glue of the point, line, surface to colloid can be realized by this system.Typical injection dispensing technology has mechanical pneumatic type and piezoelectric type.
The features such as mechanical pneumatic type is the principle based on electro-pneumatic, simple with its structure, cost is low occupy the market advantage, but the structure of this point glue equipment is general more complicated, and there is the shortcomings such as noise is large, stability is not high, frequency is low.This mode adopts pulsed high pressure air drives striker to move downward, and utilizes Compress Spring to realize striker and resets.Problems existing is: (1) striker stroke cannot regulate online in real time, and pertinent literature shows, striker stroke is the key factor affecting dispensed volume and speed, and real-time online adjustment striker stroke is one of essential condition realizing intelligent flexible allocation; (2) dispensing speed is still comparatively slow, and the components and parts such as Compress Spring, magnetic valve seriously limit the further raising of dispensing rate; (3) put glue uniformity poor, in pressure-air quick on-off process, the rapid expanding of gas and compression are very easy to cause striker to be shaken, thus reduce dispensing precision.
Piezoelectricity is contactless, is the inverse piezoelectric effect that make use of piezoelectric ceramics, has that volume is little, noiseless, resolution ratio are high and frequency response advantages of higher.The defect that it can avoid pneumatic type to exist to a certain extent, but the piezoelectric ceramic actuator output displacement scope applied in piezoelectric type is less, thus in actual applications, usually needs the output displacement of piezoelectric ceramic actuator to amplify.The displacement of piezoelectric actuator exports exists certain hysteresis phenomenon, there is the phenomenon that do not overlap in the displacement that namely voltage rise process and decline process produce, cause displacement to export and there is certain deviation, thus have impact on the colloidal volume of piezoelectric type spray site glue, cause the inexactness of a glue, but in prior art, there is no the solve scheme of this problem, and then have influence on the accuracy of high-quality point colloid system mid point glue amount and put the controllability of glue.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of piezo jet formula accurate quantification point glue equipment, provide larger displacement to export, overcome the problem of prior art deflection deficiency, Influential cases colloid amount, improve the accurate control of some glue amount simultaneously.
Concrete technical scheme is:
Piezo jet formula accurate quantification point glue equipment, comprises piezoelectric stack PZT driver, single step of releasing great institutions, three enlargers and mechanical pedestal; Single step of releasing great institutions comprises elasticity enlarger body and two resilient blade, the two ends of each resilient blade are pasted onto the middle part of single step of releasing great institutions by glue, piezoelectric stack PZT driver is embedded in the inside of single step of releasing great institutions by interference fit; The input terminal of piezoelectric stack PZT driver is connected with piezoelectric ceramic high-voltage power source; Two resilient blade of single step of releasing great institutions paste SGS foil gauge; SGS foil gauge is connected with signal condition unit, and signal condition unit is connected with singlechip controller, and singlechip controller is connected with piezoelectric ceramic high-voltage power source; Mechanical pedestal comprises front side wall, base plate, dividing plate, rear wall and cavity; Top seal is arranged at mechanical pedestal top; Have cover plate for sealing with holes above cavity, there is nozzle below, and cavity is communicated with glue case; Single step of releasing great institutions is bolted to connection the base plate being fixedly mounted on mechanical pedestal; Have three enlargers above single step of releasing great institutions, three times enlarger comprises lower plate, upper plate, connecting rod and striker; Upper plate is fixedly mounted on below top cover; Upper plate parallel installation upper and lower with lower plate, same one end of upper plate and lower plate flexibly connects, and the lower plate other end flexibly connects dividing plate; Lower plate is also connected with the top of elasticity enlarger body; Striker inserts in the hole of cavity upper cover plate, has sealing ring in hole, and the glue in striker extruding cavity sprays from nozzle.
Elasticity enlarger body is eight limit frame-shaped constructions, and the two ends of resilient blade are pasted onto the upper topside of elasticity enlarger body and the outside of bottom respectively; Between the limit, left side that piezoelectric stack PZT driver is embedded in elasticity enlarger body by interference fit and right edge; Lower plate is connected with the upper topside of elasticity enlarger body.
The control method of piezo jet formula accurate quantification point glue equipment is:
By setting the jet velocity of expectation and spray intensity on singlechip controller, control voltage is calculated by singlechip controller, piezoelectric ceramic high-voltage power source is outputted to through D/A, thus drive piezoelectric stack PZT driver to produce displacement, this displacement is by after the perception of SGS foil gauge, output to signal condition unit after amplification filtering, enter through A/D conversion the realization that singlechip controller participates in pid control algorithm; Piezoelectric stack PZT driver produces elongation and amplifies through the elastic sides distortion of single step of releasing great institutions, and then drive three enlargers to carry out three displacement equations, produce larger displacement to export, thus in promotion striker extruding cavity, glue sprays from nozzle.
Piezo jet formula accurate quantification point glue equipment provided by the invention, by single step of releasing great institutions and three enlargers, achieve amplifying for four times the Chroococcus minutus that piezoelectric stack PZT driver produces, utilize piezoelectric stack PZT driver to realize injecting type noncontact point glue as power, improve a colloid amount.Pid control algorithm is adopted to correct piezoelectricity sluggishness, make the displacement controllable precise of PZT, and then improve the some glue precision of piezoelectric type point gum machine, realize strain feedback by SGS foil gauge and demarcate in advance, the displacement of Glue dripping head can be obtained indirectly, by closed-loop control make the amplitude of piezoelectric stack PZT actuator voltage and frequency-adjustable controlled, and then the intensity that Glue dripping head is sprayed and speed adjustable controlled, improve the controllability of a controllability of glue amount and plastic emitting speed.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is partial structurtes schematic diagram of the present invention.。
Detailed description of the invention
Accompanying drawings the specific embodiment of the present invention.
As shown in Figure 1, piezo jet formula accurate quantification point glue equipment, comprises piezoelectric stack PZT driver 1, single step of releasing great institutions 2, three enlargers 3 and mechanical pedestal 11;
Single step of releasing great institutions 2 have employed triangle amplification principle, single step of releasing great institutions 2 comprises elasticity enlarger body 202 and two resilient blade 201, elasticity enlarger body 202 is overall structures, formed by Linear cut, two resilient blade 201 adopt the 65Mn material with larger elastic modelling quantity, and piezoelectric stack PZT driver 1 is embedded in the inside of elasticity enlarger body 202 by interference fit; Piezoelectric stack PZT driver 1 is connected with piezoelectric ceramic high-voltage power source 8;
Metal clad thin slice 201 on the dual-side of the elasticity enlarger body 202 of single step of releasing great institutions 2, sheet metal 201 is pasted SGS foil gauge 5; SGS foil gauge 5 is connected with signal condition unit 6, and signal condition unit 6 is connected with singlechip controller 7, and singlechip controller 7 is connected with piezoelectric ceramic high-voltage power source 8;
Mechanical pedestal 11 comprises front side wall 1101, base plate 1102, dividing plate 1103, rear wall 1104 and cavity 4; Mechanical pedestal 11 top has top cover 12 to seal; Have cover plate for sealing with holes above cavity 4, there is nozzle 9 below, and cavity 4 is communicated with glue case 10;
Single step of releasing great institutions 2 is bolted to connection the base plate 1102 being fixedly mounted on mechanical pedestal 11;
Having three enlargers, 3, three enlargers 3 to comprise lower plate 301, upper plate 302, connecting rod 303 and striker 304, three enlargers 3 above single step of releasing great institutions 2 is integrative-structures, is formed by Linear cut; Upper plate 302 is fixedly mounted on below top cover 12; Upper plate 302 is parallel one on the other with lower plate 301, and same one end of upper plate 302 and lower plate 301 flexibly connects, and lower plate 301 other end flexibly connects dividing plate 1103; Lower plate 301 is also connected with the top of elasticity enlarger body; Striker 304 inserts in the hole of cavity 4 upper cover plate, has sealing ring in hole, and the glue that striker 304 extrudes in cavity 4 sprays from nozzle 9.
As shown in Figure 2, elasticity enlarger body 202 is eight limit frame-shaped constructions, and the two ends of resilient blade 201 are sticky is respectively posted on the upper topside 2021 of elasticity enlarger body 202 and the outside of bottom 2022; Between the limit, left side 2023 that piezoelectric stack PZT driver 1 is embedded in elasticity enlarger body 202 by interference fit and right edge 2024; Lower plate 301 is connected with the upper topside 2021 of elasticity enlarger body 202.Elasticity enlarger body 202 is processed by wire cutting technology integration, this eight-sided formation, the axial stretching amount of piezoelectric actuator PZT is enlarged into the stroke perpendicular to its axis direction based on triangle amplification principle.
The control method of piezo jet formula accurate quantification point glue equipment is:
By setting the jet velocity of expectation and spray intensity on singlechip controller 7, control voltage is calculated by singlechip controller 7, piezoelectric ceramic high-voltage power source 8 is outputted to through D/A, thus drive piezoelectric stack PZT driver 1 to produce displacement, this displacement is by after SGS foil gauge 5 perception, output to signal condition unit 6 after amplification filtering, enter through A/D conversion the realization that singlechip controller 7 participates in pid control algorithm; Piezoelectric stack PZT driver 1 produces elongation and amplifies through the elastic sides distortion of single step of releasing great institutions 2, and then drive three enlargers 3 to carry out three displacement equations, produce larger displacement to export, thus promote striker 304 and extrude glue in cavity 4 and spray from nozzle 9.Under constant pressure, keep the critical condition that can not automatically flow out, the glue in glue case 10 is full of cavity 4 to glue under the influence of air pressure again.
Claims (3)
1. piezo jet formula accurate quantification point glue equipment, is characterized in that: comprise piezoelectric stack PZT driver (1), single step of releasing great institutions (2), three enlargers (3) and mechanical pedestal (11); Single step of releasing great institutions (2) comprises elasticity enlarger body (202) and two resilient blade (201), the two ends of each resilient blade (201) are pasted onto the middle part of elasticity enlarger body (202) by glue, piezoelectric stack PZT driver (1) is embedded in the inside of elasticity enlarger body (202) by interference fit; The input wire of piezoelectric stack PZT driver (1) is connected with piezoelectric ceramic high-voltage power source (8); Two resilient blade (201) upper stickup SGS foil gauge (5) of single step of releasing great institutions (2); SGS foil gauge (5) is connected with signal condition unit (6), signal condition unit (6) is connected with singlechip controller (7), and singlechip controller (7) is connected with piezoelectric ceramic high-voltage power source (8); Mechanical pedestal (11) comprises front side wall (1101), base plate (1102), dividing plate (1103), rear wall (1104) and cavity (4); Mechanical pedestal (11) top has top cover (12) to seal; There is cover plate for sealing with holes cavity (4) top, and there is nozzle (9) below, and cavity (4) is communicated with glue case (10); Single step of releasing great institutions (2) is bolted to connection the dividing plate (1103) in mechanical pedestal (11); There are three enlargers (3) single step of releasing great institutions (2) top, and three times enlarger (3) comprises lower plate (301), upper plate (302), connecting rod (303) and striker (304); Upper plate (302) is fixedly mounted on top cover (12) below; Upper plate (302) parallel installation upper and lower with lower plate (301), same one end of upper plate (302) and lower plate (301) flexibly connects, and lower plate (301) other end flexibly connects dividing plate (1103); Lower plate (301) is also connected with the top of elasticity enlarger body (202); Striker (304) inserts in the hole of cavity (4) upper cover plate, has sealing ring in hole, and the glue in striker (304) extruding cavity (4) sprays from nozzle (9).
2. piezo jet formula accurate quantification point glue equipment according to claim 1, it is characterized in that: elasticity enlarger body (202) is eight limit frame-shaped constructions, the two ends of resilient blade (201) are pasted onto the upper topside (2021) of elasticity enlarger body (202) and the outside of bottom (2022) respectively; Piezoelectric stack PZT driver (1) is embedded between the limit, left side (2023) of elasticity enlarger body (202) and right edge (2024) by interference fit; Lower plate (301) is connected with the upper topside (2021) of elasticity enlarger body (202).
3. the control method of piezo jet formula accurate quantification point glue equipment according to claim 1 and 2 is: by jet velocity and the injection intensity expected in the upper setting of singlechip controller (7), control voltage is calculated by singlechip controller (7), piezoelectric ceramic high-voltage power source (8) is outputted to through D/A, thus drive piezoelectric stack PZT driver (1) to produce displacement, this displacement is by after SGS foil gauge (5) perception, output to signal condition unit (6) after amplification filtering, the realization that singlechip controller (7) participates in pid control algorithm is entered through A/D conversion, piezoelectric stack PZT driver (1) produces elongation and amplifies through the elastic sides distortion of single step of releasing great institutions (2), and then drive three enlargers (3) to carry out three displacement equations, produce larger displacement to export, thus promotion striker (304) extruding cavity (4) interior glue sprays from nozzle (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510908781.9A CN105289934B (en) | 2015-12-10 | 2015-12-10 | Piezo jet formula accurate quantification point glue equipment and its dispensing method |
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| CN201510908781.9A CN105289934B (en) | 2015-12-10 | 2015-12-10 | Piezo jet formula accurate quantification point glue equipment and its dispensing method |
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| CN105289934A true CN105289934A (en) | 2016-02-03 |
| CN105289934B CN105289934B (en) | 2017-09-15 |
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Cited By (7)
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| CN107975395A (en) * | 2016-10-22 | 2018-05-01 | 浙江师范大学 | A kind of tappet formula of Piezoelectric Driving is without camshaft valve actuating mechanism |
| CN109092584A (en) * | 2018-10-24 | 2018-12-28 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | The micro- spray valve of Piezoelectric Ceramic |
| CN109286335A (en) * | 2018-11-15 | 2019-01-29 | 中国直升机设计研究所 | A kind of prestressed applying method of piezoelectric actuator |
| CN110460263A (en) * | 2018-05-07 | 2019-11-15 | 诺信公司 | Distributor with closed-loop control |
| CN110833968A (en) * | 2018-08-15 | 2020-02-25 | 万润科技股份有限公司 | Liquid material extrusion device and locking control method and mechanism thereof |
| CN111889680A (en) * | 2020-06-09 | 2020-11-06 | 哈尔滨工业大学 | Direct on-demand printing mechanism for hot-melt metal micro-droplets based on piezoelectric micro-jetting |
| CN114029201A (en) * | 2021-11-17 | 2022-02-11 | 上海盛普机械制造有限公司 | Compact type injection dispensing valve with adjustable glue output and glue injection method thereof |
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| JP2013139745A (en) * | 2012-01-04 | 2013-07-18 | AdvanJet | Viscous non-contact injection method and device |
| CN102615018A (en) * | 2012-04-11 | 2012-08-01 | 吉林大学 | Piezoelectric wafer control type non-contact glue dispensing device |
| CN102935416A (en) * | 2012-11-28 | 2013-02-20 | 中南大学 | Spot gluing valve based on piezoelectric ceramic drive and flexible amplifying arm |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975395A (en) * | 2016-10-22 | 2018-05-01 | 浙江师范大学 | A kind of tappet formula of Piezoelectric Driving is without camshaft valve actuating mechanism |
| CN110460263A (en) * | 2018-05-07 | 2019-11-15 | 诺信公司 | Distributor with closed-loop control |
| CN110460263B (en) * | 2018-05-07 | 2023-11-24 | 诺信公司 | Dispenser with closed loop control |
| CN110833968A (en) * | 2018-08-15 | 2020-02-25 | 万润科技股份有限公司 | Liquid material extrusion device and locking control method and mechanism thereof |
| CN109092584A (en) * | 2018-10-24 | 2018-12-28 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | The micro- spray valve of Piezoelectric Ceramic |
| CN109286335A (en) * | 2018-11-15 | 2019-01-29 | 中国直升机设计研究所 | A kind of prestressed applying method of piezoelectric actuator |
| CN109286335B (en) * | 2018-11-15 | 2020-02-21 | 中国直升机设计研究所 | Method for applying prestress of piezoelectric actuator |
| CN111889680A (en) * | 2020-06-09 | 2020-11-06 | 哈尔滨工业大学 | Direct on-demand printing mechanism for hot-melt metal micro-droplets based on piezoelectric micro-jetting |
| CN111889680B (en) * | 2020-06-09 | 2022-08-26 | 哈尔滨工业大学 | Direct on-demand printing mechanism for hot-melt metal micro-droplets based on piezoelectric micro-jetting |
| CN114029201A (en) * | 2021-11-17 | 2022-02-11 | 上海盛普机械制造有限公司 | Compact type injection dispensing valve with adjustable glue output and glue injection method thereof |
| CN114029201B (en) * | 2021-11-17 | 2022-09-23 | 上海盛普流体设备股份有限公司 | Compact type injection dispensing valve with adjustable glue output and glue injection method thereof |
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